[Refactor] Add option for number element to return an integer

[enarroied]

📌 Description

The number visual element handles both float and integer inputs. When I select a step of 1 (or another natural number), I may (or may not) want to output integers. I have a case like that. I can fix it somewhere else in the code, but I think having an argument like output_int defaulting to False would be great.
Another option would be output_type defaulting to "float" and an "integer" or "int" option. However, I only see 2 options, and booleans are unambiguous.

What do you think?

📜 Code of Conduct

• I have checked the existing issues to avoid duplicates.
• I am willing to work on this issue (optional)

✅ Acceptance Criteria

• The refactored code maintains existing functionality without breaking changes.
• Any new code is covered by unit tests.
• Code coverage remains at least 90%.
• Performance improvements are documented, if applicable.